package com.acwing.lc.part1;

import com.acwing.lc.common.ListNode;

/**
 * @author rkc
 * @date 2022/9/10 10:44
 */
public class LC21合并两个有序链表 {

    public ListNode mergeTwoLists(ListNode list1, ListNode list2) {
        ListNode dummy = new ListNode(-1), cur = dummy;
        while (list1 != null && list2 != null) {
            if (list1.val < list2.val) {
                cur = cur.next = list1;
                list1 = list1.next;
            } else {
                cur = cur.next = list2;
                list2 = list2.next;
            }
        }
        if (list1 != null) cur.next = list1;
        if (list2 != null) cur.next = list2;
        return dummy.next;
    }
}
